Air-pusvjp



' (No Model.)

R. P. GARSED.

7 AIR PUMP.

Patented Dec. 4, 1883.

INYENTOR UNITED ST TES PATENT Oriucn.

ROBERT P. GARSED, or NORRISTOWN, PENNSYLVANIA.

AIR-PUMP.

SPECIFICATION forming part of Letters Patent No. 289,641, dated December 4, 1883.

Application filed March 1, 1883.

T at whom it may concern:

Be it known that I, ROBERT P. GARSED, a citizen of the United States, and a resident of Norristown, in the county of Montgomery and State of Pennsylvania, have invented a new and useful System of Pneumatic Communication, of which the following is a specification.

The object of my invention is to provide a device by means of which pneumatic cominunr cation may be maintained between two buildings, or difierent parts of the same building, through one pipe-that is, the answering ring to a signal is returned to the sender through the same pipe through which the original signal was sent.

In the accompanying drawings, forming part of this specification, and in which similar letters of reference indicate like parts throughout the several views, Figure 1 represents a sectional side elevation of my invention; Fig. 2, a sectional side elevation of a modification of my invention; Fig. 3, an elevation of my pump; Fig. 4, an end View, looking into my pump-holder; Fig. 5, a sectional side elevation of my pump-holder; Figs. 6 and 8, sectional side elevations of pump-holders, and Fig. 7 a top view of the same; and Fig. 9 represents a perspective view of a device for opcrating the bell.

My pump A consists of a hollow rubber ball having at its end a projection, D, which fits into acorresponding cavity in the pump-holder 0. The rod H, to which the bell-pull is at tached, passes through the projection D and pump A, and is secured to a plunger, B. The pipe T, which runs between the places between which communication is desired, enters the pump-holder at some convenient place as near the rear end of said holder as possible, and the air passes from the pump A to the pipe T through an orifice, E, in the pump. It is of course preferable that this orifice be opposite the hole in the pump-holder into which the pipe T enters; but to allow the air to reach the pipe T under all circumstances, I have a groove, a, in the holder, which the orifice E will always be opposite, no matter how much the pump may turn in its holder. At some convenient place on the pipe T, and having communication with it, is a pipe, S, which con- .N across the pipe S.

(No model.)

neots with a bellows which operates any of the well-known pneumatic bell-ringing devices, and at the junction of T and .S a check-valve, G, is placed, the operation of which is as follows: It being desired to communicate with a person at the far end of the pipe T, the bellpull H is drawn out, compressing the rubber ball A and forcing the air from said ball into the pipe T. The airpasses through said pipe until it reaches the checlevalve G, the plunger of which it raises, closing the entrance to the pipe S, leading to the ringing apparatus in the same room with the operator. The air now passes through the pipe T to the check-valve G at the other end of the pipe, and up the pipe S to the ringing apparatus. In returning the answer to the signal, the operation of the device is similar to the above, the current of air and the operation of the check-valves being reversed.

By the above-described arrangement a great amount of air is saved, to be utilized in the proper ringing apparatus, and, in fact, the operation of the device is such that it is practically the same as if there were only a pump at one end of the pipe and a ringing apparatus at the other.

In Fig. 2 I have shown, in addition to the check-valve G, a damper or valve, N, to close the pipe S. This is operated by a rod, J, one end of which is secured to alever, M, (to which the damper is also attached.) and the other to the bell-pull. When the bell-pull is drawn out, the sleeve I, to which the rod J is attached, is first moved and throws the damper The plunger B is next operated, and the action of the device is similar to that already described. The rod J is furnished with a spiral spring, so that it may stretch while the pump is operated, and the lever M is furnished with a spring, 0, to insure the opening of the valve N when the pull is returned to its original position.

In the pump shown on the left of Fig. 1 the bell-pull is represented as hollow, and it has an orifice, U, within the rubber ball, through which the air passes to the ringing apparatus through a flexible pipe, V, which enters'the bell-pull at some convenient place outside of the pump A. If this arrangement were to be used, the orifice E in the pump would be abolished.

In Figs. 6, 7, and 8 a form of pump-holder is shown,which consists of arms 0 and a capped projection, 12, to secure the pump. In the arrangement shown in Fig. 6 the projection bis passed through a hole in the pump, and'the air passes to the pipe connected with the ringing apparatus through a hole, d, in the center of this projection. In Fig. 8 the projection is adjustable, and furnished with a screw-thread,

and can be brought down as close to the arms O as desired by means of a nut, c. In this devlce the bell-pull may pass through the hole d in the projection, which is of greater diameter than the pull, to allow the air from the pump to pass to the pipe leading to the ringing apparatus.

On thcplungerrod of the pump, to the right in Fig. 1, I show a spiral spring,which, for mechanical convenience, may be placed within the rubber sphere, its office being to return the plunger to its normal position. It will be seen that the pump may be operated by compressing the ball by hand, or by pushing the plunger, instead of pulling the handle H.

In Fig. 9 I have shown a perspective view of the mechanism by which the shaft X, upon which the escapelnent-wheel which operates the bell-hammer is situated, is operated. The standard R, which is carried on top of the bellows, is furnished with a tape or band, W, one end of which is secured to said standard, and the other is wound around the shaft X. At some other point on the shaft X a second band, Y, is wound around, and the free end of this band has one end of a spiral spring, Z, secured to it, the other end of this spring being fastened to some fixed point.

In operating the device, the bellows is expanded, raising the standard It and band W,

which unwinds, revolving the shaft. This winds up the band Y, stretching out the spring Z. After the operation of the bellows the spring Z contracts, unwinding the tape Y and winding up the tape WV. This returns the de vice to its original position.

Having thus described my invention, I claim- 1. In combination, the pump A, of rubber "or other flexible material,with boss D, adapted to prevent the turning of the pump within the casing O, the rod H, passing through the center of said pump,w ith operative plunger, casing 0, pipe T, and bellows 1?, said bellows adapted to be operated by the pump A;

2. In combination, the pump A, of flexible material,with opening for thepassage of air, holder 0, having an annular channel, a, connected with the opening Ein said pump, aconnecting-passage with pipe T, said pipe T with check-valves F, as described, and bellows I substantially as and for the purposes set forth. 8. The herein-described cup for supporting the rubber sphere A, consisting of the metal holder with central capped projection, b, adapted to be inserted within the sphere A and to retain the same in place,and said rubber sphere and its means of operation.in combination with pipe T and bellows P,substantially as set forth. 4. The pump A, of flexible material, with opening for the passage of air, holder having an annular channel connected with the opening in said pump, (whereby by any position of the pump within the cup a connection is formed for the passage of air through the annular channel to'the bellows,) in combination with pipe T and bellows F, substantially as set forth. R. P. GARSED. Witnesses:

Vrorron BALSIS, CHAS. A. BUTTER.- 

